This 150mL Rapid-Flow™ Series 596 bottletop filter funnel has a polystyrene housing with a Supor® machV polyethersulfone (PES) membrane. Filter securely screws onto glass media bottles with 33mm neck sizes. Allows direct filtration of liquid into sterile glass media bottles. This product is not intended for use in direct patient care or diagnostic procedures. Blue collar. Side-arm with quick-disconnect tubing adapter. Sterile. Graduated. Material: polystyrene housing with a Supor® machV polyethersulfone (PES) membrane. Filter capacity: 150mL. Membrane diameter: 50mm. Pore size: 0.2µm. Neck size: 45mm. 12/Case. Nalgene® #: 596-4520.